This looks more like human sacrifice to me, and that is a much better fit for what is known of all the city-building cultures of PreColumbian America.
Previously discovered reliefs, depicting emaciated humans
g-strings?
Could be both human sacrifice and climate-related. Snakes in Pre-Columbian America—starting from the Olmecs—are often associated with rivers and fertility rituals designed to secure rainfall, with the rituals involving human sacrifice.
Donno.
The one on the left is obviously an oriental female with saggy boobs.
The one on the right is, of course, break dancing.